Carolyn Duffy Marsan reporting in Network World: "Half of U.S. government Web sites are vulnerable to commonplace DNS attacks because they haven't deployed a new authentication mechanism that was mandated in 2008, a new study shows. The Office of Management and Budget (OMB) issued a mandate requiring federal agencies to deploy an extra layer of security — called DNS Security Extensions or DNSSEC — on their .gov Web sites by Dec. 31, 2009."